Microbial colonization on urinary and intravascular catheter
surfaces
results in steeply rising cases of catheter-associated infections
as well as blood stream infections. Currently marketed efforts include
impregnation and loading of antimicrobials and antiseptics that leach
out into the local environment and inactivate microbes. However, they
suffer from uncontrolled release, induction of resistance, and undesired
toxicity. Here, in this manuscript, we have developed a photocurable,
covalent coating on catheters using quaternary benzophenone-based
amide (QSM-1). The coating was found to be active against
drug-resistant bacteria and fungi. The coating inactivated stationary
and persister cells of superbug MRSA and inhibited the formation of
biofilms with retained activity against broad-spectrum bacteria when
challenged in realistic urinary conditions. The coating was seen to
be biocompatible in vitro and in vivo. Remarkably, the coated catheters
showed reduced fouling and >99.9% reduction in bacterial burden
when
implanted in vivo in a mice model of subcutaneous implantation. We
conceive the possibility of application of QSM-1-coated
catheters in the healthcare settings to tackle the notorious catheter-associated
nosocomial infections.